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Q. |
12 W/m K Thermal diffusivity = 5.16 * 10 -7 m2/s |
A. | 43.07 hours |
B. | 53.07 hours |
C. | 63.07 hours |
D. | 73.07 hours |
Answer» A. 43.07 hours | |
Explanation: t – t a/t 0 – t a = 0.86. also, α t/l 2 = 0.32. |
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